fix: register ViteBundle, add config, share vendor volume with node, add vite-plugin-symfony

- Add PentatrionViteBundle to bundles.php (Flex recipe didn't auto-register)
- Create pentatrion_vite.yaml config
- Share vendor named volume with node container (needed for file: npm deps)
- Add vite-plugin-symfony to package.json devDependencies

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -16,6 +16,7 @@
   },
   "devDependencies": {
     "@vitejs/plugin-react": "^4.3",
-    "vite": "^6.0"
+    "vite": "^6.0",
+    "vite-plugin-symfony": "^8.0"
   }
 }